A newsletter dedicated to summarizing interesting strength/hypertrophy related research. — 1) Repetition Tempos for Muscle Growth For muscle hypertrophy, no specific repetition tempo seems to be optimal. A wide range (0.5–8 seconds) are viable. Now, there is one study finding with an isolation exercise (the biceps curl), using the mind-muscle connection enhanced biceps growth. Thus, slightly slower rep tempos may be preferred with such movements to optimally use the mind-muscle connection.